I was surprised that our chickens had such a strong reaction the first time they experienced snow. Our hens have free range over our yard all day long and they are tucked away safe and sound at night from preditors. I was surprised when we got our first snow and all of our girls stayed in the coop for the entire day. I thought oh my this is going to be a long winter if they will not even attempt to walk on snow.
After about a week I guess they were done being "all cooped up" and they started venturing out into the new white world. I was surprised that they ate snow like a treat. The strangest thing they did was getting lost or confused. We often were finding a random hen just sitting next the house or wandering around the other side of the coop. Most times they stay together and share a single thought or action. The best I can figure is they they got cold and disoriented, so we would just pick them up and put them back inside with there friends. On really cold days now we close the door to the outside pen so they don't wander away and get confused.
Life with chickens is never dull and did I mention never clean.